Hungry shoppers, rejoice! Newbury Street, Boston’s popular destination for upscale retail, is the temporary home of one of the largest oyster suppliers in the country. For briny goodness through January 5, check out the Island Creek Oysters pop-up shop at 142 Newbury St., where bivalve lovers (or their Secret Santas) can pick up Duxbury-grown shellfish by the dozen, along with restaurant gift cards, cookbooks and oyster-centric accessories like roasting pans, shucking knives and even artisanal mayonnaise. It’s all part of the Newbury Block Party, which also features pop-ups by New England Outerwear, philanthropic-minded running apparel company Janji and East Boston-based custom ski maker Parlor. Visit newburyblockparty.com for details.